Water-heating furnace-door.



PATENTED AUG. 28, 1906.

T. LENNON.

WATER HEATING FURNACE DOOR.

APPLICATION FILED JUNE 80. 1905.

\ &\\\\\\\\\\\\\ INVE/VTUR ,THOMAS LENNON, OF YORK, N. Y.

WATER-HEATING FURNACE-DOOR.

Specification of Letters Patent.

Patented Aug. 28, 1906.

Application filed June 30, 1905. Serial No. 267.698.

1'0 (LZZ whom it may concern.-

' Be it known that I, THOMAS LENNON, a citizen of the United States, and a resident of New York city, in the county of New York and State of New York, have invented cer tain new and useful Improvements in Waterto utilize the water-heating surface which is usually occupied by a door of the ordinary construction and to so construct it and connect it with a circulating system that the door may be used to heat water for ordinary household purposes, and particularly used for heating water for apartment-houses.

To this end I have devised the constructions and combinations of parts to be hereinafter described, and distinctly set forth in the ap ended claims.

' n the drawings, Fi re 1 is a front view of a furnace provided wit a water-heating door connected to a circulating s stem. Fig. 2 is an inside face view of the cor. Fi 3 is a vertical transverse section of such a cor and the casing immediately surrounding it.

Like numerals indicate like parts in the several views.

2 designates a furnace of any ordinary form, having the usual fuel-openin Hinged to one side of the door-casing 2is t e door 3, having around its circumference the seatingflange 3, which when the door is closed fits against the door-casing, as shown in Fig. 3. As shown in Figs. 1 to 3,-the door is hollow and is divided into an upper and lower chamber by a transverse horizontal partition 4. The ower chamber 4 is connected to a source of cold-water sup 1y or to the ordinary boiler or water-tanli Connecting the lower chamber with the up er one on the inside of the door is a series 0 heatin -tubes 5, which pro'ect into the fire-space an over the grate an the supported fire. B these tubes water which enters the chem er 4' is conducted out therefrom into contact with the heating-surface of the fire and then into the upper or hot-water chamber 4", whence 1t 1passes ofl to the aforesaid boiler 7 or any 0t er part of a circulating s stem.

In order to provide for t e opening of the door 3, I connect the chambers 4 4' to the circulating system b flexible pipes 6 6", of rubber or any suita le matenal, which will per connection to t 'valueof the yield when the door is opened and follow the movement of said door. These may be connected to the door in any suitable manner. 8 is a draw-off cock located at the bottom of the lower chamber 4 to permit the outlet of water from the circulating system and the door-chambers. 8' indicates the usual latch for holding the door closed. As a door of this construction may be of considerable weight when filled with water and is therefore liable to sag, I prefer to support its free end by a chain 9, attached to a crane 9, hinged to swing with the door 3. Other means, however, may be devised for supporti'ng the free end of the door, and I do not wish to be limited to this method.

By opening the door more or less the amount of heat to which the Water is subjected may be varied at will but in case it is desired not to use the door 3 at all I rovide the furnace with a door 10, hinged to the easing 2 on the opposite end from door 3. This may be used when the door 3 is entirely swung out.

The operation of my water-heater is plain. Water in the chambers 4 4 and the tubes 5 will be heated and passout through the upe boiler, giving place to water from the boiler. Thus a constant circulation will be maintained.

The advantages of my invention are obvious. It utilizes a portion of the furnace which has heretofore one to waste. The projecting tubes take t e heat from the center of the furnace, and the door being rovided with two com artments connecte by said tubes or with t 1e coils the water circulates of itself.

Heretofore large furnaces used for heatin houses where a constant heat was maintaine could not also be used for the pur ose of water-heating, at least convenient y, for the reason that there was no means ofdecreasin the heat applied to the water when it he been sufficientlyheated. Water-backswould heat the water; but they heated it beyond necessity. My invention obviates this and is of great use in apartment-houses, where it has been necessary heretofore to use a separate heater for heating hot water. By my invention the furnace used for heating the houses may also heat the water, while at the same timethe heating-coils may be withdrawn partial] orentirelyfrom thefire. The evice is evident from the fact that a door constructed as described in any ordinary furnace will heat enough water for twelve or fourteen families. y

I am aware that furnaces have been provided with hollow fire-doors filled with, cold water for the urpose of keeping down the temperature 0 said doors; but none of such doors have been rovided with a means for compelling circu ation nor with inwardlyprojecting water-heating tubes, and theyare therefore not fitted to perform the functions of m door.

W ile I have shown what I believe to be the best embodiment of my invention I do not wish to be limited to the exact details shown, as it may be varied in man ways without departure from the spirit antl intent of my invention.

Having described my invention, What I; claim is p 1. A water-heating door for furnaces, haviug an upper and a lower chamber separated by a partition, tubes leading from one chamber rojecting inwardly into said furnace beon the inner surface of the door and then eadin to said other chamber whereby the water in one chamber shall pass out into said tubes, be heated and then pass to the other of said chambers and connections from each of said chambers to a hot-water-circulating' system, substantially as described.

2. A water-heating door for furnaces, having an up or and a lower chamber separated by a partition, tubes leading from one chamber roj ecting inwardly into said furnace beyon the inner surface of-the door and then leading to said other chamber whereby the tubes, be heated andthen pass to the other of said chambers and flexible connections from each of said chambers to a hot-water-circulating system, substantially as described.

3. A Water-heating door for furnaces, having an upper and lower chamber separated by a partition, a tubular connection between flow 0 water from one to the othenprojectin into the furnace, connections from each 0 said chambers to a hot-water-circulating system, and a swinging support for the said door adapted to support the rec end thereof in its open osition, substantially as described.

4. ing an upper and lower chamber separated by a partition, 9. connection between said nace beyond the rear ace of the door to permit the flow of water from one to the other, connections from each of said chambers auxiliary door, oppositely mounted to the water-heating door and adapted to close the furnace-opening when. the water-heating door is o ened, substantially as-described.

Signe at New York, in the county of-New York and State of New- York, this 27th day of June, A. D. 1905.

. THOMAS DENN ON. Witnesses:

Mrs. I. M. GRIFFITHS, F. B. Wmon'r.

water in one chamber shall pass out into said said u per and lower chambers to permitthe u pp; and lower chambers rojecting into ti l to a hot-water-circulating*system, and an.

water-heating door for furnaces, hav- 

